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Bug 1045018
- Implement a thread safe singleton to allow setting kAudioHardwarePropertyRunLoop property to NULL only once. r=gcp
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45
content/media/systemservices/OSXRunLoopSingleton.cpp
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45
content/media/systemservices/OSXRunLoopSingleton.cpp
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@ -0,0 +1,45 @@
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "OSXRunLoopSingleton.h"
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#include <mozilla/StaticMutex.h>
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#include <mozilla/NullPtr.h>
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#include <AudioUnit/AudioUnit.h>
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#include <CoreAudio/AudioHardware.h>
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#include <CoreAudio/HostTime.h>
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#include <CoreFoundation/CoreFoundation.h>
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static bool gRunLoopSet = false;
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static mozilla::StaticMutex gMutex;
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void mozilla_set_coreaudio_notification_runloop_if_needed()
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{
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mozilla::StaticMutexAutoLock lock(gMutex);
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if (gRunLoopSet) {
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return;
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}
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/* This is needed so that AudioUnit listeners get called on this thread, and
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* not the main thread. If we don't do that, they are not called, or a crash
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* occur, depending on the OSX version. */
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AudioObjectPropertyAddress runloop_address = {
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kAudioHardwarePropertyRunLoop,
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kAudioObjectPropertyScopeGlobal,
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kAudioObjectPropertyElementMaster
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};
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CFRunLoopRef run_loop = nullptr;
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OSStatus r;
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r = AudioObjectSetPropertyData(kAudioObjectSystemObject,
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&runloop_address,
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0, NULL, sizeof(CFRunLoopRef), &run_loop);
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if (r != noErr) {
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NS_WARNING("Could not make global CoreAudio notifications use their own thread.");
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}
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gRunLoopSet = true;
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}
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25
content/media/systemservices/OSXRunLoopSingleton.h
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25
content/media/systemservices/OSXRunLoopSingleton.h
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@ -0,0 +1,25 @@
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef OSXRUNLOOPSINGLETON_H_
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#define OSXRUNLOOPSINGLETON_H_
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#include <mozilla/Types.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* This function tells CoreAudio to use its own thread for device change
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* notifications, and can be called from any thread without external
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* synchronization. */
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void MOZ_EXPORT
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mozilla_set_coreaudio_notification_runloop_if_needed();
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#if defined(__cplusplus)
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}
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#endif
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#endif // OSXRUNLOOPSINGLETON_H_
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@ -25,6 +25,10 @@ if CONFIG['MOZ_WIDGET_TOOLKIT'] in ('android', 'gonk'):
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'OpenSLESProvider.cpp',
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]
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if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'cocoa':
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UNIFIED_SOURCES += ['OSXRunLoopSingleton.cpp']
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EXPORTS += ['OSXRunLoopSingleton.h']
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if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'gonk':
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CXXFLAGS += [
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'-I%s/%s' % (CONFIG['ANDROID_SOURCE'], d) for d in [
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